Power dashboard

Four displays above the door to the engine room: generation, consumption, balance, battery level. One glance and you know whether the night will last. For that to work, every display has to show the right unit and not seven decimal places.

DisplayMode picks the unit#

The LED display formats Setting depending on Mode. The most important ones for power:

The display does not convert the unit. DisplayMode.Celsius only appends “°C” – you have to write Celsius into it yourself, not Kelvin. And in percent mode a Ratio of 0.73 is exactly right, 73 would be 7300 %.

sbn DISP HASH("Erzeugung") Mode DisplayMode.Power
sbn DISP HASH("Akkustand") Mode DisplayMode.Percent

Feeding several displays#

Every display gets its own name and its own sbn. You simply write the Mode along every tick – it costs one line and survives somebody fiddling with the device. If several displays need the same value, give them the same name: one sbn then reaches all of them.

Rounding values#

round rounds to whole numbers. For digits after the point you shift the point: multiply first, round, divide again.

mul level level PLACES
round level level
div level level PLACES

With PLACES 100 0.7341 becomes exactly 0.73 – “73 %” in percent mode. For power values round alone is enough: 1799.8 W becomes 1800 W.

If the analyzer is missing, the three power displays show −1 and the balance turns red. A display showing NaN looks broken. One showing −1 says: “reading missing”.